Aug 02 12:43:04.747 INFO checking coap-0.7.0 against 1.27.2 for lazy_static-1
Aug 02 12:43:04.747 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:43:04.747 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 12:43:04.747 INFO running `"docker" "create" "-v" "/tmp/crater.UcslGaYLQ7dZ:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-7/1.27.2:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home/git:/cargo-home/git:rw,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +1.27.2 check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "crater"`
Aug 02 12:43:05.011 INFO blam! 16a8961507abb2d85adac09f01e391b208f3d9274b0485e9463c6f93d3ec9517
Aug 02 12:43:05.013 INFO running `"docker" "start" "-a" "16a8961507abb2d85adac09f01e391b208f3d9274b0485e9463c6f93d3ec9517"`
Aug 02 12:43:06.196 INFO kablam!     Checking bincode v0.3.0
Aug 02 12:43:07.314 INFO kablam!     Checking coap v0.7.0 (file:///source)
Aug 02 12:43:14.417 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 12:43:14.418 INFO kablam!  --> benches/client.rs:1:1
Aug 02 12:43:14.418 INFO kablam!   |
Aug 02 12:43:14.418 INFO kablam! 1 | #![feature(test)]
Aug 02 12:43:14.418 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 12:43:14.418 INFO kablam! 
Aug 02 12:43:14.419 INFO kablam! error: aborting due to previous error
Aug 02 12:43:14.419 INFO kablam! 
Aug 02 12:43:14.420 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 12:43:14.443 INFO kablam! error: Could not compile `coap`.
Aug 02 12:43:14.444 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 12:43:14.860 INFO kablam! error: build failed
Aug 02 12:43:14.864 INFO kablam! su: No module specific data is present
Aug 02 12:43:15.485 INFO running `"docker" "rm" "-f" "16a8961507abb2d85adac09f01e391b208f3d9274b0485e9463c6f93d3ec9517"`
Aug 02 12:43:15.645 INFO blam! 16a8961507abb2d85adac09f01e391b208f3d9274b0485e9463c6f93d3ec9517